I understand the frustration, 2 years later this question as well as the thread mentioned above in the Swift forums remain without a proper answer. However, I'm offering here two solutions: Use an Open Source Combine compatible library: Github/cx-org/CombineX Wait a bit longer for the latest Swift update, which includes async/await support.

Now that getStreamsToHost is deprecated. What is the recommended call to open TCP Socket streams? https://developer.apple.com/documentation/foundation/stream/1414311-getstreamstohost